material funkce

Vector3 Material::Diffuse(const Coord2f * tex_coord) const
{
	if (tex_coord)
	{
		Texture * texture = textures_[kDiffuseMapSlot];
		if (texture)
		{
			Color3f color = texture->get_texel(tex_coord->u, tex_coord->v);
			Vector3 dif;
			dif.x = color.r;
			dif.y = color.g;
			dif.z = color.b;
			return dif;
		}
	}
	return diffuse;
}